Special Provision No. 304F04 February 2017

Transcription

1 BINDER (TYPE) - Item No. CLASS 1, 2, 4, 6 AGGREGATE - Item No. CLASS 1, 2, 4, 6 AGGREGATE, FROM STOCKPILE - Item No. Special Provision No. 304F04 February 2017 Amendment to OPSS 304, November 2006 Application of Binder, Binder Sampling, Determination of Binder and Aggregate Application Rates, Quality Assurance and Price Adjustments REFERENCES Section of OPSS 304 is amended by the addition of the following: OPSS 1102 Liquid Asphalt CONSTRUCTION Sampling Binder Clause of OPSS 304 is deleted and replaced by the following: Binder samples shall be obtained as specified in the Contract Documents for testing purposes. A lot shall be deemed to be the quantity of work completed with a shipment (truck tank) of binder. A sample of binder shall be taken at the job site from each shipment of binder and this sample shall represent the lot. Each binder sample shall consist of a minimum size of two full 4-litre samples of material. The sample containers shall be new triple tight cans with lids or suitable plastic containers of similar capacity which can be closed to prevent any leakage. Sample containers shall be filled, leaving only sufficient space to allow for liquid expansion. The sample shall be taken from a sampling spigot on the transfer line, or, if one is not available, from the end of the transfer line. Each sample shall be taken after sufficient material has been drawn from the truck tank to purge the transfer line. Samples shall be identified using the Ministry of Transportation Bituminous Materials Tag PH-CC-349, supplied by the Contract Administrator. In addition, a tag shall be placed on each pail and labelled as A1 of 2" or A2 of 2". Tag PH-CC-349 is only for use by the Owner in the identification of the sample for contract administration purposes Determination of Binder and Aggregate Application Rates Subsection of OPSS 304 is deleted and replaced by the following: The specified application rate for the binder, the class of aggregate and the specified application rate for the aggregate shall be: * February 2017 Page 1 of 6 SSP 304F04

2 The Contractor shall demonstrate to the Contract Administrator satisfactory compliance to the specified application rates of binder and aggregate. At the Contract Administrator s option, this compliance may include a minimum 300 m one lane width trial section to ensure that the binder and aggregate are applied at the specified rate Equipment The Contractor shall supply the following equipment: a) A portable electronic balance: Five digit display, accuracy 0.1%, capacity 10 kg, minimum platform size of 300 mm by 400 mm. b) Sheet metal trays, each 500 mm x 500 mm inside dimension ± 1 mm, with sides 7 mm in height ± 1 mm. The sheet metal shall be a minimum of 18 gauge (approximately 1.3 mm) with soldered corners. c) One 5 kg test mass. d) A carpenter s level for levelling the balance Sampling Frequency The Contractor shall carry out field sampling to determine the binder application rates: a) At the start of each day's work. If the Contractor provides two distributors, the binder application rate of one distributor shall be determined at this time. b) When approximately half of the total day's production is completed. If the Contractor provides two distributors, the binder application rate of the second distributor shall be determined at this time. The Contractor shall carry out field sampling to determine the aggregate application rates at the start of each day's work Procedure Each section of road used to obtain the application rates shall be a maximum of 50 m in length. The Contractor shall conduct field sampling, in the presence of the Engineer, to determine the binder and aggregate application rates as follows: 1) Set up and level the balance in a firm location protected from the wind. 2) Check the tolerance of the balance with the 5 kg test mass. 3) Obtain the tare mass (in kg to three decimal places) of two clean trays and record. 4) Place the two trays in the centre of the lane being treated approximately 30 cm apart and parallel to the centreline. 5) Remove the first tray after the binder has been sprayed and before the aggregate has been applied. 6) Remove the second tray after the binder and aggregate have been applied and before rolling. February 2017 Page 2 of 6 SSP 304F04

3 7) Obtain and record the gross mass (in kg to three decimal places) of each tray. 8) Carefully patch the marks left by the trays using the binder and aggregate specified in the contract. The patches shall be rolled. 9) Clean the trays for reuse Calculations The Contractor shall perform the calculations in the presence of the Engineer as follows: 1) Obtain the net mass of the binder applied to the first tray. Net Mass of Binder = Gross Mass - Tare Mass 2) Calculate the binder application rate correct to two decimal places. Binder Application Rate (kg/m2) = Net Mass of Binder x 4 3) Obtain the net mass of binder and aggregate on the second tray. Net Mass of Binder and Aggregate = Gross Mass - Tare Mass 4) Obtain the net mass of aggregate on the second tray. Net Mass of Aggregate = Net Mass of Binder and Aggregate (from 3 above) - Net Mass of Binder (from 1 above) 5) Calculate the aggregate application rate correct to one decimal place. Aggregate Application Rate (kg/m 2 ) = Net Mass of Aggregate (from 4 above) x 4 6) The calculations shall be promptly reported to the Engineer Acceptance of Binder Application Rate The binder application rate is acceptable when the rate is within a tolerance of ± 5% of the specified rate. The binder application rate is unacceptable when the test result is outside the tolerance of ± 5% of the desired rate and work shall stop. Field sampling shall be repeated in a maximum of 50 m sections until two consecutive acceptable test results or four unacceptable test results are obtained. When two consecutive acceptable binder test results are obtained, work may proceed. When four unacceptable binder test results are obtained before two consecutive acceptable test results, the distributor shall be permanently removed from the job Acceptance of Aggregate Application Rate The aggregate application rate is acceptable when the rate of aggregate application is within a tolerance of ± 10% of the specified rate. February 2017 Page 3 of 6 SSP 304F04

4 The aggregate application rate is unacceptable when the test result is outside the tolerance of ± 10% of desired rate and work shall stop. Work may proceed when the application rate has been adjusted to the desired rate. OPSS 304 is amended by the addition of the following section: QUALITY ASSURANCE Binder Material Requirements Acceptance of the binder shall be based on testing conducted by the Owner or the Owner's agent, using current LS test methods of the MTO Laboratory Testing Manual or ASTM test procedures as specified in OPSS 1102 or The Contract Administrator shall determine the acceptability of each lot according to OPSS 1102 or Lots that are not acceptable shall be removed and repaired or accepted with a price adjustment described in subsection of this special provision. If the Contractor elects to repair the lot in lieu of a payment adjustment, the lot shall be repaired and reevaluated up to the full satisfaction of the Contractor Administrator BASIS OF PAYMENT Subsection of OPSS 304 is amended by the addition of the following: Payment for any lot of binder which does not meet all contract requirements will be subject to a price adjustment. A price adjustment is a reduction in payment in the contract price for the item and is a calculated or fixed percentage of the contract price. A calculated price adjustment will be determined, through a system of adjustment points based on test results for any lot sample when tested providing the sample remains in a condition suitable for testing. Where more than one test result is available on any one sample, the test result with the least deviation from the specification limit will be used to calculate the price adjustment. The price adjustment percentage for the lot is the total number of adjustment points for each sample divided by 25. A fixed price adjustment of 20 percent of the contract price will be made for lots for which the following conditions apply: i) The lot sample contains insufficient material for testing; or ii) The lot sample does not remain in a condition suitable for testing for 14 Days after sampling, e.g. broken emulsion or foam-over during distillation. February 2017 Page 4 of 6 SSP 304F04

5 Section of OPSS 304 is amended by the addition of the following subsection: Adjustment Points for Emulsified Asphalt Binders The total number of adjustment points will be equal to the summation of the number of units that each test deviates from the specification limits times the multiplier as specified in Table A, plus: 1000 adjustment points for failure of the Particle Charge Test when the binder type is RS-2, CRS-2, RS- 2P, or CRS-2P, HFMS-2(ON) and 200 adjustment points for failure of the Coating Test when the binder type is HF-100S, HF-150S, HF-250S, HFMS-2(ON), HF-100SP, HF-150SP or HFMS-2P(ON). Prior to the summation, all adjustment points will be rounded to one decimal place in conformance with LS-100 of the MTO Laboratory Testing Manual. February 2017 Page 5 of 6 SSP 304F04

6 Table A Tests, Units and Multipliers for Emulsified Asphalt Binder Test Unit Multiplier Residue by Distillation % 200 Viscosity (less than minimum) SFs 30 Viscosity (greater than maximum) SFs 5 Demulsibility (Note 1) % 50 Residue 25 C 0.1 mm 15 Settlement (Note 2) % 30 Storage Stability (Note 3) % 50 Oil Portion of Distillate, by Volume of Emulsion (Note 4) % 50 Sieve Test % 1000 Residue Float 60 C s 2 Residue Solubility in Trichloroethylene (Note 5) % 10 Ash Content of Residue, by Mass (Note 5) % 1000 Residue Elastic 10 C (Note 6) % 30 Residue Force 800% Elongation, 5 cm/min. pull 4 C (Note 7) kg 1000 Residue Apparent 60 C (Note 8) Pa.s 10 (Note 9) Residue 25 C (Note 10) cm 10 Notes: 1. For all Emulsified Asphalt Binder types except HF250S. 2. For Emulsified Asphalt Binder types RS-2, CRS-2, RS-2P, and CRS-2P only. 3. For Emulsified Asphalt Binder types HF-100S, HF-150S, HF-250S, HFMS-2(ON), HF-100SP, HF-150P, HFMS-2P(ON), and HFRS-2 only. 4. For Emulsified Asphalt Binder types CRS-2, HF-100S, HF-150S, HF-250S, HFMS-2(ON), CRS-2P, HF-100SP, HF-150SP, and HFMS-2P(ON) only. 5. The ash content test shall be used instead of the solubility test for Emulsified Asphalt Binder Types RS-2P, CRS-2P, HF-100SP, HF-150SP and HFMS-2P(ON) when the manufacturer indicates that the polymer additive is not soluble in trichloroethylene. 6. For Emulsified Asphalt Binder Types RS-2P, CRS-2P, HF-100SP, HF-150SP and HFMS-2P(ON) only. 7. For Emulsified Asphalt Binder Types RS-2P, CRS-2P, HF-100SP and HFMS-2P(ON) only. 8. For Emulsified Asphalt Binder Types HF-100S, HF-150S, and HF-250S only. 9. The multiplier will be used when the apparent viscosity plots below AB or AB extrapolated, CD or CD extrapolated, EF or EF extrapolated on Figure: Viscosity Requirements for Distillation Residues from High Float Emulsified Asphalt of OPSS For Emulsified Asphalt Binder Types RS-2, CRS-2 and HFRS-2 only. February 2017 Page 6 of 6 SSP 304F04